Corner Joint Weld Sizing Calculator

Calculate weld size, effective throat, and capacity for open and closed corner joints per AWS D1.1

Input Parameters

Results

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Effective Throat
in
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Allowable Load
lb
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Min Fillet Size Required
in
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Max Fillet Size
in
Note: Corner joints are one of the five basic joint types. Open corners require fillet welds on one or both sides. Closed corners can achieve CJP with proper penetration. Consider distortion control for long corner joints.

Reference

AWS D1.1 Corner Joint Welding: Open corner: fillet weld, throat = 0.707 x fillet size Closed corner: CJP possible, throat = plate thickness Half-open: combination PJP + fillet Min fillet (Table 5.8): 1/8 in for t<=1/4, 3/16 for t<=1/2, 1/4 for t<=3/4, 5/16 for t>3/4 Allowable = 0.30 x FEXX x throat x length